Numerical investigation of the mixing efficiency of fluids in the micromixer with a cylindrical section of a swirl flow

A computational study of the micromixer form influence on the mixing efficiency and pressure drop in a wide range of Reynolds numbers 1 ≤ Re ≤ 300 was carried out. It was found that as the number of segments increases, the pressure drop and mixing efficiency also increase in the whole range of Reynolds numbers. The obtained results were compared with the similar in the formulation of the problem and the initial conditions one for the T-type micromixer with a direct mixing channel of the corresponding length. The dependence of the relative reduced mixing efficiency on the Reynolds numbers was obtained. It is revealed that the use of micromixers with a complex geometric shape allows the mixing processes to intensify, especially at low Reynolds numbers.